Don't try new Samsung 22x dvd burner.

Hi. larry.

Welcome to LPF.

Red laser diodes in DVD burner are mostly 2 types: open, closed.
Closed can diode has a can covering dye crystal including AR(anti-reflection) window glass.
Open can doesn't have a covering.

You made a nice laser, but that cannot be collimated because there is no lens system.
So you should use a bare red diode with something like Aixiz module.

Ordinary red LD has 5.6mm diameter flange but this Samsung one is 3.8mm open can diode. Aixiz module is for 5.6mm diode. So 3.8mm one cannot fit the Aixiz if there is no intervening part.

IR diode in this Samsung burner is not round one, but rectangular shape at the other site. Not IR-red comebined diode like the ones in PHR, BDR-205 AFAIK.

And there are many informations for "ABC" in tutorial section. You can find useful information there.

@tuzvihar. Hi. Welcome to this forum.

I don't know the safe current of lower speed red diode.
The safe current of 20x LOC is upto about 420mA.

Red diodes(5.6mm LOC - 20x, 22x burner) are cheap and you'd better to use lower speed burner for the purpose of harvesting and excercising.

SHIN

edit]
IR diode in old CD-R, old DVD burner is 5.6mm round 780nm one that can fit in Aixiz.
That is a single mode and can be collimated into dot. And can burn something.
But be careful for eye damage because it is faint red but CAN BURN SOMETHING.
IIRC 200mA and 150mW+ after lens. Pinout is the same as the red.

SHIN said:

Hi. Krutz.

Sorry for late reply.
These days were Korean traditional holiday season - Mid-Autumn holiday.
I post a photo of samsung 22x 3.8mm diodes.
Middle one is 5.6mm normal red diode.
Dye size seems to be the same as 5.6mm.

SHIN

Click to expand...

I just bought a Samsung SH-S223 and whipped out the diode, which is smaller. I will build a driver later and post my findings. Meanwhile if anyone is interested I took some close-up pictures.

Hey, I had one of these working back in August. The key is to keep these in their heatsink from the burner. Also they need less current than the LPC815s. I silver epoxied a modified aixiz 6.5mm diode holder onto the sink of the LG22x. I'd run the diode no more than 370-380mA at 3.5v. I killed mine at a shy over 400mA! The diode gives the same beam characteristics as the LPC 815! tight beam good burner.
I'd seriously be using a proper driver (lava or die4driver) for attempting an LG 22x build.

daguin said:

This is the same red diode that is in the BDR-203 sleds. I had one , but did not get a chance to test it (it was stolen in the burglary). There are a few members that can fabricate an adapter for you.

This is significantly better than the "flat, plastic" red diode that is in the LG model.

Peace,
dave

Click to expand...

I harvested one of those crappy diodes..... i just threw it out what a waste of my time..... What gives? so cheap they cant afford a real laser diode

Does anyone have any more info on these units? Has anyone else worked with these? I was just handed a new drive by my computer guy, and was wondering if they are worth a darn.

Wonder if they are small enough to put three in a triangle configuration in an Aixiz with the mounts pointing outwards?

That would be interesting methinks, the beams would be centred nicely and you would get about 2.7* the power of a single diode provided that you could adequately cool the thing.

Nope.

Have the same diode (2* in one can) on this DVD writer made by Asus, DRW-20B1LT

It also has the nice optical block with the pop-off cover so it can be easily um, dissected.
This particular drive had a broken eject mechanism after less than a year, and only 20 DVDs burned.
So if you see one surplus, it is handy for experiments but not much use for taking diodes out of.

i believe someone has branded them as the SmOC meaning small Open Can.

You could source some 3.8mm modules for them if you wanted to, the LPC-826 is alot better choice tho.